| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.net.flow; |
| |
| import org.onosproject.net.flow.instructions.ExtensionPropertyException; |
| |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Abstract implementation of the set/get property methods of Extension. |
| */ |
| public abstract class AbstractExtension implements Extension { |
| |
| private static final String INVALID_KEY = "Invalid property key: "; |
| private static final String INVALID_TYPE = "Given type does not match field type: "; |
| |
| @Override |
| public <T> void setPropertyValue(String key, T value) throws |
| ExtensionPropertyException { |
| Class<?> clazz = this.getClass(); |
| try { |
| Field field = clazz.getDeclaredField(key); |
| field.setAccessible(true); |
| field.set(this, value); |
| } catch (NoSuchFieldException | IllegalAccessException e) { |
| throw new ExtensionPropertyException(INVALID_KEY + key); |
| } |
| } |
| |
| @Override |
| public <T> T getPropertyValue(String key) throws ExtensionPropertyException { |
| Class<?> clazz = this.getClass(); |
| try { |
| Field field = clazz.getDeclaredField(key); |
| field.setAccessible(true); |
| @SuppressWarnings("unchecked") |
| T result = (T) field.get(this); |
| return result; |
| } catch (NoSuchFieldException | IllegalAccessException e) { |
| throw new ExtensionPropertyException(INVALID_KEY + key); |
| } catch (ClassCastException e) { |
| throw new ExtensionPropertyException(INVALID_TYPE + key); |
| } |
| } |
| |
| @Override |
| public List<String> getProperties() { |
| Class<?> clazz = this.getClass(); |
| |
| List<String> fields = new ArrayList<>(); |
| |
| for (Field field : clazz.getDeclaredFields()) { |
| fields.add(field.getName()); |
| } |
| |
| return fields; |
| } |
| } |